"Foundation"--The fledgling Foundation finds itself at the mercy of corrupt warlords rising in the wake of the receding Empire. "Foundation and Empire"--The Foundation and the Galactic Empire civilizations are battling for mastery of the Universe. No one could have predicted the birth of the creature called the Mule, a power that could turn the strongest-willed human into an obedient slave. "Second Foundation"--After years of struggle, the Foundation...